Until the updated version of your ad passes moderation, Yandex.Direct will continue showing the old version (with old keywords and prices). A message that the old ad is being shown will appear under the ad, next to its moderation status.
After the moderator has approved the new ad, the updated one will automatically replace the previous version. Moderators may reject the keywords partially. If the ad text itself has been accepted, then the ad will start to be displayed with the accepted phrases. In this case, the ad will have the following status: “Some of the key words were rejected”.
If, while waiting for moderation, you deactivated the old ad, please don't forget to reactivate it after moderation concludes. Once your ad is edited, its statistics will display only the updated text, and the list of keywords in the statistics will include only the updated keywords.